SQL Data Warehouse

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  1. Performance with respect to dynamic SQL

    In our solutions we load data from csv-files into SQL DW internal tables using polybase/external tables.

    Per roll-out we face the challenge that the schema (columns) in the csv may differ for the same table. Therefore we implemented a logic to lookup the column name and data type from a dictionary table and we create the external and internal table schemes dynamically. As we have round about 500 tables with up to 20 columns per table automating this process is the only way to go.

    The issue we face is that compared to an on premise SQL Server the dynamic…

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    2 comments  ·  Performance  ·  Flag idea as inappropriate…  ·  Admin →
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